Stainless Steel for paper, sheet cardboard cutting. Make Perfect Paper art with this paper-knife. Perfect grip for holding long term. Cutter ideal for thicker cuts. It can also be used for commercial or industrial purpose like cutting thick paper, cardboard, photos , coupons, card stocks, mat board, foam board, delicate fabrics, etc Specification: Hard SK5 steel blade for easy cutting, Use snap-off cover in the back to break the worn blade, Pen clip design, Automatic lock system for safe use.